Flue-expander.



No. 7||,5s|. Patented octyzl, |902.

A. MuNcH. FLUE EXPANDER.

{Applicaton tiled May 10, 1902.) (No Model.)

UNITED STATES i VATENT OFFICE.

ARTHUR MUNOH, OF ST. PAUL, MINNESOTA.

FLUE-EXPANDER.

SPECIFICATION forming part of Letters Patent No. 711,581, dated October 21, 1902.

Application filed May 10|1902. Serial No. 106,688. (No model.) i

To all whom t may concern:

Beit known that I, ARTHUR MUNCH, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of'Minnesota, have invented certain new and useful Improvements in Flue-Expanders, of which the following is a' specification. f

My invention relates to improvements in ue-expanders, its object being to provide improved means for holding the parts together and for guiding the pressure-rollers.

To this end my invention consists in the features of construction and combination hereinafter described and claimed.

In the accompanying drawings, forming part of this specification, Figure 1 is a side elevation of my improved flue expander, showing the mandrel in connection therewith. Fig. 2 is a rear end elevation of the expander. Fig. 3 is a section on line :c x of Fig. 2, and Fig. 4 is a front end elevation of the flue-ex pander.

Referring to the drawings, A designates the head of the flue-expander, provided with a central aperture 2, through which is adapted to bepassed the mandrel B. The outer portion 3 of the head is reduced, as shown, and its reduced portion is provided with longitudinal openings 4, in which are placed the pressure-rollers 5. In the inner face of the base 6 of the head are formed the grooves 7,v

connecting with the openings 4. Each of the grooves 7 is preferably curved and receives the enlarged end 8 of the right-angle-shaped guide C, the opposite end 9 of the guide projecting into an opening 10 in the end of the adjacent roller 5. Surrounding the head is a sleeve 11. The sleeve 11 is formed with a shoulder 12, abutting against one side of the base of the head, the sleeve upon the opposite side of the base of the head being formed with a groove 13, adapted to receive the spring 14. One end 15 of the spring projects into an opening in the Wall of the sleeve, as shown in Fig. 2. The edge of the sleeve adjacent to the oppositeY end of thespring is formed with a finger-opening 16 to allow the removal of the spring from. its groove. By means of the shoulder 12 the spring 13 of the sleeve is securely held upon the head, closing the ends of the grooves 7 and preventing displacement of the roller-guides.

the guides it can be removed and a new one substituted.

I claim- 1. In a hue-expander, the combination of a head provided with a series of longitudinal side openings, rollers arranged in said openings, and right-angled guides, one end of each of said guides projecting into an opening in the adjacent roller, and the opposite end of each guideprojecting outwardly and being slidable in a groove in the head.

l 2. In a flue-expander, the combination with a head formed with' a base portion and a narrowed portion, said narrowed portion being provided with longitudinal openings in its side, rollers arranged in said openings, and guides carried by the base of said head and projecting into said rollers, of a sleeve for the base of said head, said sleeve being provided with a shoulderbearing against one side of said base, and a locking-spring interposed between the opposite side of said base and said sleeve.

3. In a flue-expander, the combination with a head provided with a base and a centrallyprojecting narrowed portion, said narrowedportion being provided with longitudinal side openings, pressure-rollers arranged in said openings, and guides carried by said base and projecting into said rollers, of a sleevesurrounding said base, said sleeve being provided with a shoulder bearing against one side yof said base, and a spring removably arranged in a groove in said sleeve upon the opposite side of said base, said spring projecting inwardly over said base, as and for the vpurpose set forth. v

4. In a hue-expander, the combination with a head provided with longitudinal side openings, and rollers arranged in said openings, of right-angle-shaped guides for said rollers, one end of each guide removably projecting IOO into the adjacent roller, and the opposite outwardly-projeeting end of said guide being enlarged and slidable in a groove in said head, a sleeve surrounding said head, and means for detaehably securing said sleeve thereon.

5. In aline-expander, the combination with a head formed with a base portion and a narrowed portion, said narrowed portion being provided with longitudinal openings in its side, rollers arranged in said openings, and guides for said rollers, of a sleeve inolosing the base of said head, a locking-spring removably arranged in a groove in said sleeve adjacent to one end of the base, said sleeve projectinginwardly over said base, and means x5 ARTHUR MUNCH.

Witnesses:

H. S. JOHNSON, p EMILY EASTMAN. 

